Read Your Two Energy Clocks

Your calendar has hours. Your brain has timing. Process S: pressure Sleep pressure builds the longer you are awake. It is why late-day work can feel effortful even when nothing dramatic happened. Process C: rhythm Circadian rhythm promotes alertness and sleepiness on a roughly daily cycle. Light, wake time, meals, and routine help tune it. Performance planning Use the model as a scheduling lens. Place high-consequence thinking where both clocks are favorable, and put routine work where the cost of lower sharpness is smaller.

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